Paper Mario: The Thousand-Year Door Tips

Twilight glitch
I had 10 shop points but no space for the mushroom for this. I went to twilight town and got turned into shadow mario and got vivian then went to the twilight shop lady and talked to her and she sad i had 10 shop pionts but she didn't give me the mushroom and the bubble stayed up witout words in it. i left the shop and everything but the text bubble stayed there until i left town!